import babelpolyfill from 'babel-polyfill'
import Vue from 'vue'
import App from './App'

import VueRouter from 'vue-router'
import store from './vuex/store'
import Vuex from 'vuex'
import routes from './routes'


import 'font-awesome/css/font-awesome.min.css'

//引入ElementUi
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
Vue.use(ElementUI)

//配置axios的全局属性和基础路径
import axios from "axios";
Vue.prototype.$http = axios;
//只有发送axios请求才会加上这个基础路径
axios.defaults.baseURL="http://localhost:8080";

Vue.use(VueRouter)
Vue.use(Vuex)

//NProgress.configure({ showSpinner: false });

const router = new VueRouter({
  routes
})

//=============axios的前置拦截器==========================//
//作用：每次发送axios请求之前都要执行这个业务
axios.interceptors.request.use(config=>{
  //携带token
  let token =  localStorage.getItem("token");
  if(token){
    //只要将token放到请求头，请求头的信息会随着axios请求发送到后端
    config.headers['token']=token;
  }
  return config;
},error => {
  Promise.reject(error);
})

//=============axios的后置拦截器==========================//
//作用：专门处理axios响应回来的数据。先于回调函数执行
axios.interceptors.response.use(res => {
  //后端响应的是没有登录的信息
  if (false === res.data.success && "noLogin" === res.data.msg) {
    //删除localStorage的token和logininfo
    localStorage.removeItem("token");
    localStorage.removeItem("logininfo");
    //跳转到登录页面
    router.push({path: '/login'});
  }
  return res;
},error => {
  Promise.reject(error)
})

//======================路由拦截器【拦截不到后端或不发送axios请求的请求】====================//
router.beforeEach((to, from, next) => {
  //如果访问登录页面   或  注册页面
  if (to.path == '/login' || to.path == "/register") {
    next();//放行
  }else{//其他页面都需要判断你是否登录过
    //获取localStorage的登录信息
    let logininfo = localStorage.getItem('logininfo');
    if (logininfo) {
      next(); //登录过放行
    } else {
      //没有登录信息并且访问的不是登录或注册页面
      next({path: '/login'});//跳转到login - 登录页面
    }
  }
})

/*router.beforeEach((to, from, next) => {
  //NProgress.start();
  if (to.path == '/login') {
    sessionStorage.removeItem('user');
  }
  let user = JSON.parse(sessionStorage.getItem('user'));
  if (!user && to.path != '/login') { //如果你访问的不是登录页面   并且 session里面没有user = 没有登录
    next({ path: '/login' })
  } else {
    next()
  }
})*/

//router.afterEach(transition => {
//NProgress.done();
//});

new Vue({
  //el: '#app',
  //template: '<App/>',
  router,
  store,
  //components: { App }
  render: h => h(App)
}).$mount('#app')

